"Lectric Washing Soda is a water softener and heavy duty cleaner which can be used all around the home. 100 percent Australian made and owned. Provides great versatility and value and is environmentally friendly."
This powder, when mixed with warm water, is great for instantly removing grease, fat, grime and stains in the kitchen (eg ovens, range-hoods, fridges, bench-tops) and soap scum in showers etc. Really good for cleaning floor tiles when a little white vinegar and dishwashing liquid is added to, and mixed with, the solution in a bucket. A cheap, low-chemical, no-fume way to clean, and it goes a long way. For example: https://www.onegoodthingbyjillee.com/11-helpful-uses-for-was…
This is the cheapest its been on Amazon/supermarkets for a while. Coles and Woolworths sell for $5 a bag.
I use this for the swimming pool to increase pH. Its what Bunnings / pool shops sell as soda ash, its exactly the same thing.